I think in this case what you are seeing is likely the result of font hinting, specifically due to the new Direct2D renderer. What does the same font at the same size render like in other applications?
If you really need to avoid this you can…
- Switch to the software renderer (although you’ll loose other benefits too)
- Edit the font to remove all hinting
- Create a custom Bitmap font
- Increase your font size so hinting has a less obvious impact
It’s of course also possible there is a slight size difference too but looking at the images you supplied I’m not sure that is the case. If you look at the gif I’ve included below it seems to me as I said it’s probably just following the hinting of the font.
